25,168 research outputs found
Right to repair: will the public choose to reuse e-products for longer?
No full textThe University of Southampton’s Olanrewaju S. Shittu, Ian D. Williams and Peter J. Shaw look at the right to repair, and ask will the public follow the waste hierarchy and choose to reuse e-products for longer
Hele-Shaw Flow Near Cusp Singularities
No full textThis thesis discusses the radial version of the Hele-Shaw problem. Different from the channel version, traveling-wave solutions do not exist in this version. Under algebraic potentials, in the case that the droplets expand, in finite time, cusps will appear on the boundary and classical solutions may not exist afterwards. Physicists have suggested that for (2p+1,2)-cusps, that near cusp singularities of Hele-Shaw flow, after scaling X, Y by some powers of time t respectively, the main part of Y(X, t) is a one-parameter family and does not depend on time t. They have also suggested that the solutions of the Hele-Shaw problem are connected with dispersionless KdV (dKdV) hierarchy. In this study, we rigorously proved that this is the case for (3,2)-cusps when the droplets are simply connected and the external potentials are algebraic. We gave exact solutions and showed that the main parts of the exact solutions are some special solutions of the dispersionless string equation. More over, borrowed from the physical paper\cite{Teo} with a little more details, we showed the arguments of how these special solutions are related to dKdV hierarchy
Estudo do escoamento imiscível água/óleo mediante experimentação em célula de Hele-Shaw e simulação CFD
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia QuímicaO estudo de sistemas água-óleo é de fundamental importância para diversos processos industriais. Procedimentos como a recuperação secundária de petróleo e o bombeamento de óleos de viscosidade elevada, mediante a injeção conjunta de água, exemplificam situações na indústria petrolífera em que o comportamento da interface água-óleo traz importantes conseqüências para a eficiência da produção. Também nos casos de vazamentos a partir de dutos submersos, e na contaminação de águas subterrâneas pela proximidade de uma fase óleo, os aspectos fenomenológicos desse sistema imiscível devem ser conhecidos a fim de que medidas adequadas de remediação e quantificação dos danos ambientais possam ser postos em prática. O fato de o petróleo ser, de um modo geral, mais viscoso e menos denso que a água faz com que, no escoamento simultâneo desses dois fluidos, a água apresente a tendência de se deslocar com maior velocidade em relação ao óleo. Como conseqüência, dependendo das diferenças de viscosidades e densidades entre os dois fluidos, além das forças de tensão interfacial, pode vir a ocorrer o fenômeno de digitação viscosa. Assim, no deslocamento de óleo por injeção de água, fingers gerados a partir da fase água podem penetrar na fase óleo, ocasionando um retardamento no deslocamento do óleo com saída antecipada da água, o que representa um prejuízo para a operação. Uma ferramenta de simulação fluidodinâmica, apta a descrever corretamente os fenômenos e padrões de escoamento de um sistema águaóleo, sob diferentes condições operacionais, pode se constituir em notável instrumento para aprofundar conhecimentos da fenomenologia envolvida e, também, gerar elementos de inovação tecnológica para as diferentes aplicações Neste trabalho, explora-se o comportamento de um sistema água-óleo através de um modelo tridimensional de uma célula de Hele-Shaw. Esse modelo reproduz uma célula real carregada com água e óleo com dimensões de 100 cm de comprimento por 30 cm de largura, com espaçamento típico entre as placas de 0,10 cm. Uma série de ensaios computacionais foram realizados para validar o modelo, além dos critérios usuais de estabilidade numérica e fechamento de balanços. O modelo computacional da célula de Hele-Shaw, possibilitou a observação do comportamento da interface. As propriedades dos fluídos (densidade, viscosidade e tensão superficial) e fenômenos físicos (temperatura, capilaridade, força gravitacional e velocidade de injeção do fluído) influenciaram diretamente na resposta do sistema. Através de simulações computacionais foi possível estudar individualmente a importância e efeito que cada fator exerce sobre o sistema, desde as propriedades dos fluidos até as condições de contorno aplicadas, foi possível também, identificar o grau de atuação das forças interfaciais, gravitacional e do arraste viscoso, levando ao surgimento do fenômeno de digitação viscosa. Comprovou-se que o aumento das forças capilares costuma levar a um aumento da instabilidade, com conseqüente aumento no número de fingers desenvolvidos, aumentando a área de óleo em atraso e reduzindo a eficiência do processo. The study of systems water-oil is of fundamental importance for several industrial processes. Procedures as the secondary recovery of petroleum and the pum situations in the industry of petroleum where the behavior of the interface wateroil brings important consequences for the efficiency of the production. Also in the cases where happen leaks starting from ducts submerged, and in cases of contamination of underground waters for the proximity of a phase oil, the aspects of phenomena of that system immiscible should be known so that appropriate measures of recovery and quantification of the environmental damages can be put into practice. The fact of the petroleum to be, in general, more viscous and less dense than the water does with that, in the simultaneous drainage of those two fluids, the water presents the tendency of moving with larger speed in relation to the oil. As consequence, depending on the differences of viscosities and densities among the two fluids, besides the forces of interface tension, it can come to happen the phenomenon of viscous fingering. Like this, in the oil displacement with injection of water, fingers generated starting from the phase water can penetrate in the phase oil, causing retardation in the displacement of the oil with premature exit of the water, what represents damage for the operation. A tool CFD # Computational Fluid Dynamics, capable to describe the phenomena and patterns of drainage of a system water-oil correctly, under different operational conditions, it can be constituted in notable instrument to deepen knowledge of the involved phenomenology and, also, to generate elements of technological innovation for the different applications. In this work, the behavior of a system water-oil is explored through a 3D model of a cell of Hele-Shaw. That model reproduces a real cell loaded with water and oil with dimensions of 100 cm of length for 30 cm of width, with typical spacing among the plates of 0,10 cm. A series of rehearsals computation was accomplished to validate the model, besides the usual criteria of numeric stability and closing of swingings. The computational model of the cell of Hele-Shaw, made possible the observation of the behavior of the interface. The properties of those flowed (density, viscosity and tension surface) and physical (temperature, capillarity, forces gravitational and speed of injection of the flowed) phenomena influenced directly in the answer of the system. Through computational simulations it was possible to study the importance and effect that each factor exercises on the system individually, from the properties of the fluids to the outline conditions applied, it was possible also, to identify the degree of performance of the interface forces, gravitational and of the it drags viscous, taking to the appearance of the phenomenon of viscous fingering. To prove that the increase of the capillary forces take the an increase of the instability, with consequent increase in the number of developed fingers, increasing the oil area in delay and reducing the efficiency of the process
Shaw and Feminisms On Stage and Off
No full textWhen offstage actions contradict a playwright's onstage message, literary study gets messy. In his personal relationships, George Bernard Shaw was often ambivalent toward liberated women--surprisingly so, considering his reputation as one of the first champions of women's rights. His private attitudes sit uncomfortably beside his public philosophies that were so foundational to first-wave feminism. Here, Shaw's long-recognized influence on feminism is reexamined through the lens of twenty-first-century feminist thought as well as previously unpublished primary sources. New links appear between Shaw's writings and his gendered notions of physicality, pain, performance, nationalism, authorship, and politics. The book's archival material includes previously unpublished Shaw correspondence and excerpts from the works of his feminist playwright contemporaries. Shaw and Feminisms explores Shaw's strong female characters, his real-life involvement with women, and his continuing impact on theater and politics today.Cover -- Contents -- Foreword -- Acknowledgments -- Introduction -- PART I. THE WOMESN IN SHAW'S PLSYS -- 1. Shaw's Athletic-Minded Women -- 2. Shaw and Cruelty -- 3. Shutting Out Mother: Vivie Warren as the New Woman -- 4. The Politics of Shaw's Irish Women in John Bull's Other Island -- PATE II. SHAW'S RELATIONSHIP WITH WOMEN -- 5. Bernard Shaw and the Archbishop's Daughter -- 6. Writing Women: Shaw and Feminism behind the Scenes -- 7. Feminist Politics and the Two Irish "Georges": Egerton versus Shaw -- 8. The Passionate Anarchist and Her Idea Man -- PART III. SHAVLAN FEMINISM IN THE LARGER WORLD -- 9. Mrs Warren's Profession and the Development of Transnational Chinese Feminism -- 10. Shaw's Women in the World -- 11. The Energy behind the Anomaly: In Conversation with Jackie Maxwell -- Bibliography -- Contributors -- Index -- A -- B -- C -- D -- E -- F -- G -- H -- I -- J -- K -- L -- M -- N -- O -- P -- Q -- R -- S -- T -- V -- W -- X -- Y -- ZWhen offstage actions contradict a playwright's onstage message, literary study gets messy. In his personal relationships, George Bernard Shaw was often ambivalent toward liberated women--surprisingly so, considering his reputation as one of the first champions of women's rights. His private attitudes sit uncomfortably beside his public philosophies that were so foundational to first-wave feminism. Here, Shaw's long-recognized influence on feminism is reexamined through the lens of twenty-first-century feminist thought as well as previously unpublished primary sources. New links appear between Shaw's writings and his gendered notions of physicality, pain, performance, nationalism, authorship, and politics. The book's archival material includes previously unpublished Shaw correspondence and excerpts from the works of his feminist playwright contemporaries. Shaw and Feminisms explores Shaw's strong female characters, his real-life involvement with women, and his continuing impact on theater and politics today.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
Joan of Arc in Shakespeare, twain and shaw
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Florianópolis, 1983
Meshless Simulation of Hele-Shaw Flow
No full textProceeding of: 14th European Conference on Mathematics for Industry (ECMI 2006), Universidad Carlos III de Madrid, Leganés, Madrid, SpainA novel meshless approach was proposed for solving the Hele-Shaw flow which models plastic injection molding, in the case of a Newtonian fluid. Here, we have extended this idea to non-Newtonian Hele-Shaw flow via a Newton algorithm for the resulting nonlinear PDE.This work has been supported by the Spanish MECD grants MAT2005-05730
and FIS2007-62673 and by Madrid Autonomous Region grant S-0505. F. Bernal
acknowledges E. Kansa, G. Fasshauer, R. Beatson and L. Ling for their most
useful comments.Publicad
Salix diazii M. Idrees & J. M. H. Shaw 1015, nom. nov.
No full textSalix × diazii M. Idrees & J.M.H. Shaw, nom. nov. Replaced name:— Salix × longissima T.E.Díaz & J.Andrés (1987: 132), nom. illeg., non S. longissima P.Wessel (1855: 140). Type:— SPAIN. Léon Province: La Martina, 490 m, 29TPH91, 16 June 1985, T.E. Díaz et al. s.n. (holotype, LEB29538!, isotypes LEB29539!, LEB30605!). Etymology:— The specific epithet honours Prof. Dr. Tomás Emilio Díaz González (University of Oviedo, Oviedo, Spain), author of the replaced name, for his tremendous contributions to the taxonomy of the genus Salix. Distribution:— Spain, Léon Province (La Martina).Published as part of Idrees, Muhammad & Shaw, Julian M. H., 2022, A new name for extant Salix × longissima T. E. Díaz & J. Andrés (Salicaceae), pp. 213-214 in Phytotaxa 550 (2) on page 213, DOI: 10.11646/phytotaxa.550.2.11, http://zenodo.org/record/664103
End of use textiles: gifting and giving in relation to societal and situational factors
No full textThe clothing and fashion industry is associated with the seeking of new trends to meet and influence consumer demands. In consequence, the rates at which clothing and other textiles are purchased are high, as are the associated rates at which end-of-use items arise. Ensuring that methods and systems are in place to permit and encourage items deemed to be end-of-use by one person to be utilised to their full potential by other(s) is clearly desirable. This study aimed to elucidate how societal and situational factors influence the purchasing of clothing and other textiles, how decisions are made regarding end-of-use of these items, and the routes and means by which end-of-use textiles are subsequently passed on or disposed of. A comparison was therefore made of the public in Southampton (UK; relatively high income and established waste management systems) and Dakar (Senegal; relatively low income and with largely informal waste management systems) in which societal and situational factors contrast. Comparison of these two case studies was thus expected to provide insight as to the influence(s) of society and situation upon the generation and fate of end-of-use textiles. Through a questionnaire survey, the study found that factors leading to purchasing, decisions regarding end-of-use of items and post-use destinations differed markedly between these two contrasting cities. However, reuse of end-of-use clothing and textiles was common in both cities, which is desirable in reference to the aims and principles of the waste hierarchy. High levels of reuse occur despite the common belief that more developed and established systems provide better opportunities for effective waste and resource management
Essays on Malory, par F. Oakeshott, C. S. Lewis, E. Vinaver, D. S. Brewer, P. E. Tucker, F. Whitehead, S. Shaw, éd. J. A. W. Bennett
No full textBlanchet Marie-Claude. Essays on Malory, par F. Oakeshott, C. S. Lewis, E. Vinaver, D. S. Brewer, P. E. Tucker, F. Whitehead, S. Shaw, éd. J. A. W. Bennett. In: Cahiers de civilisation médiévale, 9e année (n°33), Janvier-mars 1966. pp. 73-74
So let him stare, I do not care, I shall not go away [first line of chorus]
No full textstrophic with choruspiano and voice (solo and satb chorus)ads on back cover for W.F. Shaw stock41-3Johns Hopkins University, Levy Sheet Music Collection, Box
135, Item 068Words by Miss Katie Belle Wichmann. Music by E. Mack.J.M. Armstrong, Music Typographer, 138 S. Eighth St
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